What is the function of an anti-reflective coating on optics?

An anti-reflective coating on optics is designed primarily to minimize glare and increase light transmission. This coating achieves its function by reducing the amount of light that is reflected off the surface of the lens or optical element. When light hits a lens, some of it is reflected away, which can lead to a loss of brightness as well as the creation of distracting glare. The anti-reflective coating mitigates these effects by allowing more light to pass through the lens and reach the eye.

This increased light transmission is particularly beneficial in various environments, especially in low-light situations where every bit of light counts for image clarity and brightness. While features such as enhancing color contrast and providing a scratch-resistant surface play significant roles in overall optics design, these are not the primary function of an anti-reflective coating. The primary role remains focused on enhancing clarity and reducing unwanted reflections for optimal visual performance.